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PDF OZ9972 Data sheet ( Hoja de datos )

Número de pieza OZ9972
Descripción (OZ99xx) Intelligent Lighting
Fabricantes O2Micro 
Logotipo O2Micro Logotipo



Total 31 Páginas
		
OZ9972 Hoja de datos, Descripción, Manual

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OZ9972 pdf
OZ9933
FEATURES
• Constant operating frequency
• Drives positive/negative-impedance lamps during ignition
• High drive current for external MOSFETs
• User-defined ignition time and shutdown delay time
• Built-in intelligence for lamp ignition and normal operation of CCFLs
• Open-lamp and over-voltage protection
• Soft start function
GENERAL DESCRIPTION
OZ9933 is a high performance, cost-effective Cold Cathode Fluorescent Lamp
(CCFL) controller designed to drive large-size LCD applications using 2. 4, or 6
CCFLs. It supports a full bridge, power conversion topology, while maintaining high
efficiency operation.
This controller converts an unregulated DC voltage into a nearly sinusoidal lamp volt-
age and current waveforms. It supports full-bridge power conversion topology, while
maintaining high efficiency operation.
The OZ9933 offers a high level of integration, while maintaining flexibility and high
efficiency operation that reduces external component heating, resulting in higher
reliability and longer CCFL life. The proprietary design technique provides a simple,
low-cost system solution.
APPLICATIONS
• LCD Monitor
APPLICATION DIAGRAM
OZ9937
FEATURES
• Universal panel interface
• Drives positive/negative-impedance lamps during ignition
• Independent PWM and analog dimming control
• Operating frequency compensation
• User-defined PWM dimming frequency
• User-defined striking and normal operating frequency
• Open-lamp and over-voltage protection
• User-defined ignition and shutdown delay time
• Soft start function
GENERAL DESCRIPTION
The OZ9937 is a high performance, cost-effective Cold Cathode Fluorescent Lamp
(CCFL) controller designed to drive large-size LCD Monitor applications using 2 to 6
CCFLs.
OZ9937 receives a panel ID signal from the system and provides an optimal operat-
ing frequency and power to the LCD panel. The adaptive feature enables a single
inverter design to suit various panel applications.
The controller converts unregulated DC voltage into a nearly sinusoidal lamp voltage
and current waveforms. It provides two drive signals for most power conversion
topologies, while maintaining high efficiency operation.
APPLICATIONS
• LCD Monitor
APPLICATION DIAGRAM
U.S. Patent #’s 6,259,615; 6,396,722; 6,559,606; 6,804,129; 6,809,938; 6,856,519; 6,897,698; 6,900,993; 7,026,860; 7,120,035;
7,151,394; 7,394,209; 7,417,382; 7,515,445; 7,515,446; 7,777,425; and more patents pending.
8
U.S. Patent #’s 6,259,615; 6,396,722; 6,559,606; 6,804,129; 6,809,938; 6,856,519; 6,900,993; 7,120,035; 7,372,213;
7,394,209; 7,417,382; 7,515,445; 7,515,446; 7,777,425; and more patents pending.
9

5 Page

OZ9972 arduino
OZ9960
FEATURES
• High frequency DC/DC boost converter controller
• Integrated power MOSFET
• Supports low input voltage
• Up to 200mA LED current
• External PWM dimming
• Open LED protection
• MOSFET over-current protection
• Soft start function
GENERAL DESCRIPTION
OZ9960 is a high efficiency DC/DC boost converter controller that drives a string
of LEDs connected in a serial configuration. It is ideal for small and mid-size LCD
backlight applications.
OZ9960 supports a wide input range and constant, user-defined operating frequency
for a single string LED application. It receives an external Pulse Width Modulation
(PWM) signal for dimming control.
APPLICATIONS
• Notebook/Netbook Computer
• GPS
• PND
APPLICATION DIAGRAM
OZ9979
FEATURES
• High efficiency DC/DC boost converter controller
• Drives up to 6 strings in parallel
• Enhanced dimming resolution
• Supports 6 equal-delay PWM dimming signals
• Integrated power MOSFET
• Integrated LED current balance control circuit
• Supports external, internal PWM and analog dimming
• PWM dimming frequency synchronized with external signal
• MOSFET over-current protection
• Over-voltage protection
• LED short circuit detection
• Output short circuit/open diode protection
• Thermal protection
• Soft start function
GENERAL DESCRIPTION
OZ9979 is a high efficiency, DC/DC controller that drives up to six strings of LEDs
connected in parallel configuration; with multiple LEDs in each string connected in
series. It is targeted for notebook backlight applications.
The IC provides six (6) LED current sense inputs in an “OR” configuration for im-
proved backlight reliability. This allows the backlight to remain functioning in the
event that any string (s) is damaged during normal operation.
APPLICATIONS
• Notebook Computer
APPLICATION DIAGRAM
Patents pending.
20
U.S. Patent #7,498,793; 7,847,783; and more patents pending.
21

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